一项新的研究显示，南太平洋的座头鲸像人类一样，按照季节变化着追求的音乐潮流。
A new study reveals that, just like humans, humpback whales in the South Pacific follow musical trends that change by the season.
几群在基因上说有差异的座头鲸，彼此隔绝的生活南太平洋，没什么基因交流。
Several genetically different groups of humpbacks, separate populations with little interchange among them, live in the South Pacific.
当年一道巨大的无冰走廊，一头向着通过太平洋一侧的洛基山脉一路向南延伸至美国各地，另一头深深延伸至被大陆冰层覆盖着的加拿大广袤土地。
The way further south into the rest of America was through an ice-free corridor between the Rocky Mountains on the Pacific side, and the vast continental ice-sheet covering Canada on the other.
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